TABLE 1.
Items used for the tremor-dominant/indeterminate/postural instability and gait difficulty (TD/indeterminate/PIGD) and TD/mixed/akinetic-rigid (AR) classifications.
| TD/indeterminate/PIGD (Jankovic classification) | TDS/mixedS/ARS (Schiess classification) | TDK/mixedK/ARK (Kang classification) |
| Tremor score | Tremor score | Tremor score |
| UPDRS-II | UPDRS-II | UPDRS-II |
| 2.16 Tremor | 2.16 Tremor RUE | |
| 2.16 Tremor LUE | ||
| UPDRS-III | UPDRS-III | UPDRS-III |
| 3.20 Rest tremor face | 3.20 Rest tremor face | 3.20 Rest tremor face |
| 3.20 Rest tremor RUE | 3.20 Rest tremor RUE | 3.20 Rest tremor RUE |
| 3.20 Rest tremor LUE | 3.20 Rest tremor LUE | 3.20 Rest tremor LUE |
| 3.20 Rest tremor RLE | 3.20 Rest tremor RLE | 3.20 Rest tremor RLE |
| 3.20 Rest tremor LLE | 3.20 Rest tremor LLE | 3.20 Rest tremor LLE |
| 3.21 Action tremor RUE | 3.21 Action tremor RUE | 3.21 Action tremor RUE |
| 3.21 Action tremor LUE | 3.21 Action tremor LUE | 3.21 Action tremor LUE |
| PIGD score | AR score | AR score |
| UPDRS-II | UPDRS-II | UPDRS-II |
| 2.13 Falling | ||
| 2.14 Freezing | ||
| 2.15 Walking | ||
| UPDRS-III | UPDRS-III | UPDRS-III |
| 3.29 Gait | 3.22 Rigidity neck | 3.22 Rigidity neck |
| 3.30 Postural stability | 3.22 Rigidity RUE | 3.22 Rigidity RUE |
| 3.22 Rigidity LUE | 3.22 Rigidity LUE | |
| 3.22 Rigidity RLE | 3.22 Rigidity RLE | |
| 3.22 Rigidity LLE | 3.22 Rigidity LLE | |
| 3.23 Finger taps | 3.23 Finger taps | |
| 3.24 Hand movements | 3.24 Hand movements | |
| 3.27 Arising from chair | 3.25 Rapid alternating movements of hands | |
| 3.28 Posture | 3.26 Leg Agility | |
| 3.29 Gait | 3.27 Arising from chair | |
| 3.30 Postural stability | 3.31 Body bradykinesia | |
| 3.31 Body bradykinesia |
The table lists the UPDRS items used to calculate each patient’s tremor score, PIGD score, and AR score in the different subtype classification systems. Specifically, the ratio of mean tremor score to mean PIGD score is used to divide motor subtypes into TD (ratio ≥ 1.5), indeterminate (1.0 < ratios < 1.5), and PIGD (ratio ≤ 1). Similarly, the ratio of mean tremor score to mean AR score divides motor subtypes into TDS (ratio > 1), mixedS (0.8 < ratios ≤ 1.0), and ARS (ratio ≤ 0.8). In addition, the ratio of tremor score (sum of items 20–21 divided by 4) to AR score (sum of items 22–27 and 31 divided by 15) divides motor subtypes into TDK (ratio > 1), mixedK (0.8 ≤ ratios ≤ 1.0), and ARK (ratio < 0.8). UPDRS, unified Parkinson’s disease rating scale; RUE, right upper extremity; LUE, left upper extremity; RLE, right lower extremity; LLE, left lower extremity.